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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 16:

What happens when zinc rod is immersed in copper (II) tetraoxosulphate (VI) solution/

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A The blue colour of the solution disappears
B Electrons flow from copper to zinc
C The zinc rod remain undissolved
D The copper generate more copper ions

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Question 17:

C₂H_4(g) + H_2(g) â†’ C₂H_6(g) Î”H = -137kJ mol_-1
The reaction represented above is

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A Exothermic
B Spontaneous
C Endothermic
D In equilibrium

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Question 18:

How long would it take to deposit 0.08g of copper from CuCl₂ solution by passing a current of 0.5A?
[Cu = 64, F = 96500 C mol_-1]

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A 6 mins
B 8 mins
C 24 mins
D 48 mins

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Question 19:

tartaric acid is used industrially to

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A Make baking powder
B Make fruit juices
C Remove rust
D Dry substance

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Question 20:

The salt formed from strong acid and a strong base is

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A Complex
B Neutral
C Basic
D Acidic

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